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T. M. AVERY- Feb. 9

BAG MAKING AND PRINTING MAQHINE Filed Sent. 15C, 1925 l3 sheets sheet l1,618,041 15 1927' T. M. AVERY BAG MAKING AND PRINTING MACHINE FiledSent. 50. 1925 13 Sheets-Sheet 2 animator 7/ ae M14057 Stratum 1,618,041Feb. l5 :2 T M. AVERY BAG MAKING AND PRINTING MACHINE I Filed Sgpt. 30,1925 13 sheets -sheet 5 V 1 618 04? Feb. 15 1927. T NLAVER 1 BAG MAKINGANP PRINTING MACHINE Filed Sept. 30, .1925 13 Sheets-She et 4 l91,618,041 h 15 27 T. M. AVERY BAG MAKING AND vPRINTING MACHINE 1" FiledSent. :50. 1925 13 Sheets-Shed- 5 eb 15 T. M. AVERY I BAGJMAKINGAND'PRINTING MACHINE r. :Filed Sept. 30. 1925 13 sheets -shet e /55 66Show H501 J r Que Feb. 15 1927.

"r. M. AVERY BAG MAKING AND PRINTING MACHINE Filed Sept. 30, 1925 13 $heets$heet 7 .lll

. uventoz flue fifflw Quartz .v 1,618,043 15 1927' T. M. AVERY I BAGMAKING AND PRINTING MACHINE Filed Sent. 30. 1925 1:5 Sh'eet-Shet aavwamto'a 1927. 1 Feb T. M. AVERY BAG MAKING AND PRINTING MACHINE lSheetQ-Sheet 9 Filed Sept. 50, 1925 Feb. 15 1927- I T. M. AVERY BAGMAKING AND PRINTING NAcHINE "i3 Sheets'-Sheet 10 Filed Sept. 30, 1925than,

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1927. Feb 15 I T. M. AVERY BAG MAKING AND PRINTING MACHINE 1ssheets-Sheet 11 Filed Sent. 30, 1925 f 1,618,041 15 1927' T. M. AVERYBAG MAKING AND PRINTING MACHINE Filed Sept. 50, 1925 v 13 shegts-fihegt12 F167: 5 7. 24$ 7 Y- 24.9 //l 17 T 24/ awuento'v i U a; waxy/7 11 M.AVERY BAG MAKING AND PRINTING MACHINE Filed Sept. 50, 1925 13sheets-sheet 1s lnllllll Ill lllll Patented Feb. 15, 1927.

i hearse TRUE M. AVERY, OF GLENS FALLS, NEW YORK, ASSIG-NOR TO UNION BAG& PAPER CORPORATZON, OF HUDSQN FALLS, NEN YOBI A COBTEORATION OF NEVIYORK.

BAG MAKING AND PRINTING MACHINE.

Application filed September The present invention relates toimprovements in machines for making and printing paper bags and itrelates more particularly to machines of the class wherein a paper tubeis formed and cut into bag-forming sections and the bag sections arepasse successively through a printing mechanism which prints labels orother desired impressions thereon.

The primary object of the invention is to provide a novel and improvedmachine of this class whereby the operations of forming and printingbags are performed rapidly and with certainty, the printed impressionson the bags are accurately and uniformly 'a egistered, especially whenimpressions in different colors are made, the machine is adjustable toenable it to form and print bags of different lengths, it embodies meansfor stackingthe finished bags in piles each of a predetermined orcounted number, for delivery and the various parts of the machine,particularly the printing mechanism thereof, are easily accessible tothe attendant.

To tnese and other ends, the invention con- 'sists in certainimprovements and combinations and arrangements of parts, all as will behereinafter more fully described, the features of novelty being pointedout particularly in the claims at the end of the specification.

Tin the accompanying drawings 2- Figure 1 is a side elevation of acombined bag-forming and printing machine constructed in accordance withthe present invention;

Figure 2 is an elevation of the machine, as shown in Figure 1, as viewedfrom the left-hand end thereof, the beg-delivery mechanism beingomitted;

Figure 3 represents a horizontal section through Figure 1, taken on theline 38 of said figure;

Figure ,4 is a detail view, on an enlarged scale. showing the forwardingrolls and their driving and controlling means, as viewed from the leftin Figure l;

v Figure 5 is a detail view showing in elevation the main shaft andcounter-shaft forming part of the driving means for the breaker arm, thesleeve on the main Sha t 30, 1925. Serial No. 59,668.

through which the breaker arm is driven being shown in section;

Figure 6 is a cross-seetion taken on the line 6G, Fig. 5, showing thedriving gearmg for the pinch rolls and the countcrshaft:

Figure 7 is a diagrammatic view of the lower and upper folder rolls andthe cooperative forwarding rolls, and the impression roll and thecooperative printing rolls and a portion of the bag-delivery means;

,Figures 8 and 9 are detail views, on an enlarged scale, of the lowerfolder roll, a portion of the upper folder roll and the cooperativeforwarding rolls, the forwarding rolls being shown in operativecondition to grip and advance a bag section inFig. 8, and in relativelyseparated or non-forwarding condition in Figure 9; c

Figure 10 is an enl elevation of the lower folder roll equipped with thecreaser blade and paste bar;

Figure 11 is a side elevation of the lower folder roll;

Figure 12 is an end elevation, partly in section, of the upper folderroll:

Figure 13 is a side elevation of the upper folder roll;

Figure la is a detail view showing the periphery of the upper folderroll and illustrating the bag nipping means;

Figure 15 is a detail view of the idler roll which cooperates with theupper folder roll, together with the supporting and controlling meansfor this idler roll;

Figure 16 is an end elevation of the idler roll and its supportingmeans, as shown in Figure 15, and as viewed toward the right in saidfigure, the supporting bracket for the shaft being omitted and a portionof the upper folder roll being shown in cooperative relation with theidler roll;

Figure 17 is a detail view of the dofl'ers which assist in transferringthe folded or completed bags from the upper folder roll to theimpression roll, together with the smoothing plate which cooperates withthe impression roller;

Figure 18 is a view of the doffers and smoothing plate mounted on theirsupporting shaft;

Figure 19 represents a section on the line i 19-19 of Figure 18, lookingtoward the right;

Figure 20 is an elevation of the lmpression roll, a portion of theperipheral sur face thereof being broken away to illustrate thesupporting and operating means for the grippers;

Figure 21 is an elevation of the left-hand end of the impression roll asshown in Figure 20, parts being broken away;

Figure 22- is an elevation of the right-hand end 'of the impresssionroll, as shown in Figure 20;

Figure 23 is a detail viewof the members of a coupling, one of whichserves to connect each gripper to the supporting shaft to effectretraction or opening of the gripper;

Figures 2a and 24L illustrate, respectively, the left-hand andright-hand ends of the delivery mechanism which stacks the finished bagsin piles each of a predetermined or counted number;

Figure 25 is a detail view of the triggers and controlling mechanismwhereby the delivery mechanism is caused to operate to stack thefinished bags in alternate piles; and

Figure 26 is a detail view of the delivery chute or conveyer whichconducts the finished bags from the impression roll to the stackingmechanism Figure 27 is a longitudinal sectional View of one of the typeor printing rolls;

Figure 28 is a view of the left-hand end of the type roll shown inFigure 27, a portion thereof being broken away;

Figures 29 and 30 are edge views and elevations respectively of one ofthe pinch bars carried by the type roll;

Figure 30 is a detail view partly in section, illustrating one of thepinch bar actuating springs and its mounting;

Figure 31 is a side elevation of a portion of the inking mechanismFigure 32 is a detail section on an enlarged scale taken longitudinallythrough the hearing and mounting for one of the ink rolls;

Figure 33 represents a crosssection through the bearing and itsmounting, taken on the line 33-33, Figure 32; and

Figure 34 is a detail end view ofthe hearing removed from theu'iounting.

Similar parts are designated byihe same reference characters in theseveral figures.

The present invention provides a combined bag-making and printingmachine which is adapted to form the bags from ha sections which are cutsuccessively from a tube of paper, the bag sections being operated uponby mechanism which forms a fold at one end thereof to produce a closedbot-- tom, the bag thus formed being printed as it is advanced throughthe machine, and the printed bags are delivered and stacked in pilesready to be removed from the machine. The preferred embodimentof theinvention is shown in the accompanying drawings and will be hereinafterdescribed in detail, but it is to be understood that the invention isnot restricted to the precise construction shown as equivalentconstructions are contemplated. and such will be included within theclaims.

The portion of the machine which forms the paper tube from'which the baglengths or sections are cut may be of the same general type as thatillustrated and described in my prior Patent No. 1 539,62 i, granted May26, 1925. This portion of the machine may be here described briefly ascomprising a former 1 which is mounted on and extends longitudinally ofthe main frame or bed 2 and is adapted to receive a flat strip of paperwhich is fed to the former and folded aroundit by a folding device 3, ina manner well known to those ami iar with bag-making machines of thisgeneral class. The paper tube is fed continuously along the former l bya pair of draw rolls 4-. which grip the paper tube between them, and theportion of the paper tube which has been advanced beyond the serratedsevering edge 50s the former is gripped at predetermined periods by bars6 on upper and lower pinch rolls 6 which operate at such a speed thatthe pinched portion of the paper tube will be retarded in its movementrelatively to its speed between the draw rolls, thus producing slack inthe tube between the pinch rolls and draw rolls while it is held bythese rolls. The paper tube is severed. at predetermined intervals toterm the bag sections by a breaker arm 7 which is fixed to and revolveswith a breaker shaft 8 and swings periodically past the severing edge 5of the former and acts on the slack portion of the paper tube A movableknife 9 is pivoted on a shaft 10 and has an arm 11 arranged to beengaged periodically by a cam 12 fixed on the lower pinch roll shaft 13whereby the knife 9 will be caused to bear against the lower side of thepaper tube on the former 1 adjacent to the severing edge 5 of the formerimmediately prior tothe swing of the breaker arm past the end of theformer this knife operating in conjunction with the severing edge 5 ofthe former serving to sever the bag length from the remainder of thepaper tube on lines which produce the mouth and upper or closing flap ofthe bag. The construction and, mode of operation of the draw rolls,pinch rolls, the breaker and the movable knife may be substantirlly thesame as is fully illustrated and described in my prior patent abovereferred to except that the movable knife is located at the under sideof the former, so that it will sever the lower side of tr e paper tubeand the direction of rotation of the breaker arm is reversed, so that inthe present instance the breaker arm will swing downwardly past theforward end of revolve in unison and in the The bag-making mechanismthus far dc scribed is, in the present instance, driven from the shaft13 which is utilized as the lower pinch roll shaft, this shaft being provided with a belt pulley l l or other suitable means for receiving powerfrom any suitable source. The draw rolls 4: are connected to "opriatedirections by gears 15 and 1b which are fixed on the outer ends to theirshafts 1'? and 18, respectively, and one of the u roll shafts, the lowershaft 18, receives otion through the gear 16 which is fixed the an .imeshes with an idler gearlil, the idler being driven from a which i .nthe shaft 13. In order t n n an rolls l to be driven at d differentlengths for the 11 differentsizes, the 9%: 20 i plied to the shaft -3,so tn;

tions in the ratio of tamed between the draw rolls 4- anrl the 13enabling the paper tube be ad a greater speed when relatively eshaftvane-ed bags are to be produced and at a relatively slower speedwhen relatively shorter smaller bags are to be produced. The intermedite or idler 19 between the s has the bearing stud 1.9 fl t a slot 19which is concentric 18 of thelower draw roll so that the mediate gear 19willremain in mesh m the 16 while itis adjusted in its to mesh properlywith the different s change gears 2-0 that may he placed on the lowerpinch roll shaft The breaker shaft 8 is driven by a bevel. gear 1 iii: tand meshing with a sin'iilar gear the ter being fixed on or formed apart 0' a sleeve which is loosely or revolul y mounted on the shaft 13,this sleeve having a gear 24 which is nesh s with a gear 25 of the samesize located beneath it. 0 d on a The gear .45 is counter-shaft 26mounted in suitable b'e' ings in the bed or main frame 2. Th shaft 13and the countersha'l't 26 ha "7 and 5255 key or others fir and these areconnee. by in :1 2?) so 19 late gear that the shaf jv iii will beconnect 1 o revolve in rela 'irely rese directions. Through the drivingc= neCtionL-s just described, or other driving; connections, the drawrolls wi. 4 driren in di ections to advance the p s" to the )iiiiii'dend of the former a alter arm will be revolved in d tion which causes toswin downu past the severing edge on the forward eno. of the former andthe knife The mo bl knife 9 will be lifted against the lower a can ofthe paper tube immediately preceding" each severing operation by the cam12 which 18 fixed on the shaft 13 and cooperates with the flnger 11which is, in turn, fixed to one end of the shaft 10 which carries themov-- able knife. Vl hile a paper tube forming and cut-off devicesubstantially similar to those heretofore used generally has beenillustrated and described, it will be understood that any other suitablemechanism may be of bags of different lengths, this supplemental frameis adjustable in a direction longitudinally on the stationary main frameor bed 2 whereby the distance between the bag folding mechanism on thesupplemental frame and the forward end of the former 1. may be varied tosuit the length of bag to be made. As shown, the supplemental frame 30narrowed at its lower portion to form frame members 31. which areadapted to fit between the sides of the stationary frame or bed 2, theseframe members being rigidly connected by a suitable number of transversemembers 82, and the upper portion of the supplemental frame 30 occupiesa position above the upper edges of the side members of the bed 2forming rests 33 which are adapted to seat on the upper longitudinaledges of the bed. Any suitable means may be provided for shifting thesupplemental frame 30 in a direction longitudinally on the bed 2- andfor holding the supplemental frame in any desired position ofadjustment. As shown, a nut 34' is fixed on a cross member which isattached to the lower portion of the supplemental frame, this nutbeingarranged to receivea threaded row 36 which is connected to or formed aspart of a shaft 37. This shaft is journailed in a. bracketE-SS which isfixed to the relatively stationary bed 2 and has a bevel gear fixedthereon and meshed with a bevel gear as, the latter being fitted to across s aft 4-1 which is journaled in suit able boa 18 in the bracket 34and is extended to one side of the bed and'provided with ahand-wheel 44:by means of which it may be rotated. The screw and nut con nection thusprovided between the bed and the longitudinally movable supplementalframe enables the latter to be easily and quickly shifted longitudinallyof the bed to adjust it for the making of bags of different le ,g5ths,and when the supplemental frame hasreached any desired position ofadjustinent, it will be held in such position by the screw and nutconnection. It will be understood, however, that other suitable meansmay be provided for adjustingthe supplemental frame longitudinally ofthe bed'and for holding it in different adjusted positions. Each bagsection delivered from the bag former is received by upper and lowerfolder rolls 45 and 46 which are mounted on shafts 47 and 48 which arejournaled in suitable bearings in the sides of the supplemental frame30, the nip of these rollers being located preferably in substantialalinement with the bag former. The lower folder roll is so driven thatit makes one revolution for each bag section received by it, the shaft48 of this roll having a gear 49 idly mounted thereon and arranged tomesh with an intermediate gear 50, which, in turn, meshes with a-gear 51which is fixed on the shaft 13. The longitudinal adjustment of thesupplemental frame 80 will vary the distance between the lower folderrollshaft 48 which is carried by the supplemental frame and the shaft 13which is mounted in bearings on the station'- ary main frame or bed, butthe driving connectlon between these shafts may be maintained by theintermediate gear 50, the bearing studs of which is adjustable in a gear51. Suitable gearing is provided to connect the lower folder roll shaftwith the shaft 47 of the upper folder roll. Preferably, the upper folderroll is of a diameter double that of the lower folder roll and it isconnected to revolve at one-half the speed of the lower folder roll, theupper folder roll shaft 47 being shown provided in the present instancewith a gear 52 which is fixed thereon and meshed with the gear 49 idleon the lower folder roll shaft 48, the gear 52 being double the diameterof thevgear 49. The opposite ends of the upper and lower folder rollshafts 47 and 48 are connected by a pair of gears53 and 54 which arefixed on these shafts, the gear 53being double the diameter of the gear54. The gears 53 and 54 thus maintain the proper relationship betweenthe'upper and lower folder rolls, and by reason of the idle mounting ofthe gear 49 on the loner folder roll shaft, longitudinal adjustment ofthe frame 30 carrying the folding and printing mechanisms may beaccomplished without disturbing the relationship' between the upper andlower folder rolls.

The lower folder roll 46, as shown in Figures 7, 10 and .11, is providedwith a creaser blade 55 and with an adj acently located pastebar 56, thepaste bar being of a length which conforms with the width of the bags tobe made, and it is fitted at its ends in slots 57, formed in clamps 59,the latter being mounted on the shaft 48 at opposite ends of the lowerfolder roll and clamped in fixed position thereon by tightening ofclamping screws with which they are provided. The ends of the paste barmay be secured in the clamps 59 by screws 61. The body portions of theblade 55 and bar 56 lie in a slot or recess 62 which extendslongitudinally across the face of the lower folder roll, the blade 55being secured against one wall thereof as by the screws 58, and thisslot or recess is preferably of suflicient circumferential width topermit adjustment of the distance between the bar 56 and the" blade 55to compensate for end folds of dif ferent lengths by rotation of'theclamps 59 on the roll shaft. The edges of the blade 55 and bar 56project beyond the circumference of the lower folder roll, the paste bar56 projecting for a distance greater than that of the creaser blade 55.

The upper folder roll 45 is provided with means to cooperate with thecreaser blade 55 whereby a crease will be formed across the forward endof each advancing bag section and such bag section will be nipped at thecrease to form the bottom fold of the bag and to hold the bag section tothe upper folder roll during its travel therewith. Preferably, and asshown, the upper folder roll is provided at diametrically oppositepoints in its circumference with bars 63 which are inserted flush withthe circumferential surface of the roll and each barforms a nipping edge64. A shaft 65 is rotatably mounted in each bar 63 and carries a nipperblade 66 which is movable toward and from the nipping edge 64 incidentto rotation of the respective shaft 65. Each of the shafts 65 isprovided with a spring 67 which acts to yieldingly rotate the shaft in adirection to move the nipp-er blade 66 toward the relatively stationarynipping edge 64 and to hold the doubled edge of a bag section nippedbetween them, and means is provided for rotating each shaft 65 to boltedor otherwise secured to the adjacent side of the frame 30. The track 72of this cam on which the rollers 69 are adapted to travel issubstantially concentric with the axis about which the upper folder roll45 revolves and. its length determines the periods during which thenipper blades are in nipping and released positions. rhe

approaches a position in alinement with the I centers of the upper andlower folder rolls, the nipping edge 64 will lie at one side of thecreaser blade while the nipper blade 66 will lie at the opposite side ofthe creaser blade, the nipper blade at this time being held in its openor retracted position by the roller 69 which is connected thereto andstill rests upon the cam 70. By spacing apart the creaser blade 55 andthe paste bar 56, as shown in Fig. 7, a space is provided between theseparts in which the nipper blade 66 may be accommodated. As the nippingmeans on the upper folder roll and the creaser blade on the lower folderroll approach this position the leading end of a bag section, indicatedat a, which has been advanced to the folding mechanism, willlie betweenthe folder rolls, and as the latter revolve in the direction of thearrows in Figure the portion of the bag section adjacent to but in rearof its leading edge, will be pushed by the exposed edge of the creaserblade 55 into the gap provided between the nipper edge 64; and theretracted nipper *lade 66. A portion of the periphery of the lowerfolder roll 46 in advance of the creaser blade is preferably recessed orcutaway, as at 73, to avoid gripping of the portion of the bag sectionin advance of the creaser blade 55 between the closely adjacent surfacesof the upper and lower folder rolls, so that the portion of the bagsection adjacent to the creaser blade is free to be forced into the gapor recess formed between the nipper blade 66 and the nipping edge 64.Immediately after the folder rolls have revolved suliiciently to carrythe creaser blade 55 beyond a position in alinement with the centers ofthe folder rolls, the roller (3-9 connected to the nipper blade 66passes of? the end of the cam 70 and the spring 6? connected to theshaft 65 which carries the nipper blade acts immediately to close thenipp-er blade 66 against the nipping edge G l as the edge of the creaserblade 55, which is preferably pointed, or relatively sharp, iswithdrawing from a position between the nipper blade 66 and the nippingedge 64, inconsequence of which the portion of the bag section which wasforced into this space by the creaser blade will be nipped along itscreased edge and will be firmly held between the nipper blade 66 and thenipping edge of the upper folder roll. In order to facilitate accuratetiming of the movements of the nipper blade 66 to and from nippingposition, the cam 70 which controls tl e movements of the nipper blademay comprise relatively adjustable cam sections 70 which, as shown inFigures 12 and 13, are adjustable in a direction circumferentially ofthe cam and thus enable'the ends of the onto and from which the rollerspass to be accurately located.

(3Q \Jd Means is provided for applying. a line of paste or adhesive tothe portion of the bag section adjacent to the creased and nippedportion thereof. As shown in the present meta-nee, the paste is appliedto the bag section in rear of the portion thereof which is creased andnipped, by the paste bar 56 which is located on the lower folder roll inrear of the creaser blade During rota-- tion of the lower folder rollthe edge of the paste bar which projects outwardly beyond the creaserblade comes into contact with a paste covered roll 74 which is mountedto revolve in the upper portion of a paste boX 7 5 so that its peripherywill be touched by the edge of the paste bar 56 as the latter revolvespast it, the paste thus transferred to the outer edge of the pastebar'being applied to the bag section adjacent to but in rear of thecreased and nipped portion thereof. The periphery of the upper folderroll 45 is provided with a recess '76 in rear of each nipper blade 66therein into which the portion of the 'bagsectionengaged by the pastebar may be pressed more or less, the inherent resilience of the paper"composing the bag section insuring sufficient yielding pressure betweenthe bag section and the paste bar to effect the application of asuflicient amount of paste thereto. The paste roll 7% may be keptsupplied with paste by providing a cooperating paste roll 77 which issubmerged or immersed to a sufficient depth in a body of paste containedin the paste box 7 5, the paste rolls 7% and 77 being arranged tomaintain contact with one another and being rotatedduring the operationof the machine, so that they have a substantially rolling engagement bygears 78 and 79 which are fixed to the shafts 80 and 81 of theserollers. A. driving gear 82 fixed on a shaft meshes with the gear 79 andserves to drive the paste rolls 7% and 7 7 continuously, the shaft 83being connected by bevel gears 8d and to a shaft 86 and the latter beingconnected, in turn, by a Worm wheel 67 and a cooperating worm 88 to thelower folder roller shaft 4.6 to which the worm is fixed.

Means is preferably provided for forward-- ing the severed bag sectionsfrom'the former to the upper and lower folder rolls. As shown in thepresent instance, sucliforwarding means comprises a pair of forwardingrolls 89 and 90 which are mounted at the side of the folder rolls whichis toward the delivery end of the former, the lower for transversemember 93 which is attached to 'or forms part of the lower portion 31 ofthe adjustable supplemental frame. The upper forwarding roll 89 has itsshaft mounted in bearings 94, which are slidable in guides 95 formed inthe upper portions of the brackets 92, so that the upper forwarding rollmay move into and out of cooperative relation with the lower forwardingroll. A compression spring 96 bears on each of the bearings 94 and actsto yieldingly hold the upper forwarding roll in bag-ad vancing relationwith the lower forwarding roll. The forwarding rolls are connected torevolve in unison and in directions to advance a bag section to thefolder rolls'by gears 97 and 98 which are fixed on the shafts of theserolls, and the forwarding rolls are driven continuously by a gear 99which meshes with the gear 98 on the lower forwarding roll and with thegear which is fixed on the shaft 48 of the lower folder roll 46.

While the forwarding rolls are thus driven continuously during theoperation of I the machine and at a speed that will advance the bagsections to the folder rolls to conform substantially with the speedwith which the bag sections are passed between these folder rolls, meansis preferably employed for interrupting the advance of each bag sectionby the forwarding rolls after such bag section has been nipped by thefolder rolls. For this purpose, a cam'100 is provided on the shaft 48 ofthe lower folder roll, the raised portion 101 of this cam being arran edto operate upon a roller 102 which iscarried by an arm 103, the latterbeing fixed to a shaft 104 which is mounted to rock in the brackets 92.The driving gear 99 for the forwarding rolls may be loosely mounted onthis shaft 104 as a supporting journal. The shaft 104 has a pair of arms105 fixed thereon and these arms are arranged to bear against pins106which are guided to move longitudinally in the respective brackets 92and to bear at their upper ends against the bearings 94 for the oppositeends of the upper forwarding roll.

' While the roller 102 is riding on the low part of the cam 100 withwhich it is held in contact by the springs 96 which act through the pins106, rock shaft 104, arms 105, and arm 103, the upper forwarding rollerwill be pressed toward the lower forwarding rolland the forwarding rollswill when the creaser blade and paste bar on' the lower folder roll andthe nipping means 011 the up'per folder roll approach the position shownin Figure 7, the high part 101. of the cam will have reached the roller102-,

ant. as the operation of the machine con 7 tinues, the roller 102 willbe forced outwardly or away from the lower folder roll shaft 48, and inso doing, the pins 106 are actuated to lift the bearings 94 and therebyseparate the upper forwarding roll from the lower forwarding roll to anextentsufficient to cause these forwarding roll; to release their gripupon the interposed bag section. Asthe foremost end of the bag sectionat this time is grippedbetween the folder rolls, tlie latter are enabledto act properl upon the bag section to Grease and nip it and to effectthe further advance of the bag tion without interference from theforwardingrolls.

sec-

' The cam 101, which controls the advance,

and release of the section by the forwarding rolls is preferably splitor formed of two d1sklil e sections which are relatively adjustable in acircumferential direction in order to vary theflength and the pos1tionsof the ends of the raised portion .101 thereof depthof the bottom foldson all bagsmade according to such adjustment."

The nipping of the leading end of the bag section by the nipper blade 66of the upper folder roll causes the forward edge a of the bag section toproject outwardly from 1 this folder roll, and as this folder rollrotates 1n the d1rect1on indicated by the arrow in Figure 7, the nippedbag section will be advanced while lying against the periphery of thisroll until it reaches an impression roll 107 which is mounted above theupper folder roll 45 in suitable bearings provided in the sides of theadjustable'frame 30. Means is provided for folding this outwardlyprojecting edge of the bag .section down against the portion of the bagsection in rear of the crease therein and to which paste was previouslysupplied by the paste bar 56. As shown, such means comprises an idlerroller 108 composed preferably of rubber or other relatively yieldingmaterial, the ends of the shaft 109 of this roller being revolublymounted in bearings 110 formed in the upper ends of a pair of arms 111.

lVfeans'v is provided for yieldingly holding V the roller 108 in contactwith the peripheral surface of the folder roll 45 or with abag sectionthereon, and preferably, the opposite ends of this roller 108 arecapable of relatively independent movement toward or from the folderroll 15, whereby the idler roll may equalize its pressure on the bagsection and accommodate itself to irregularities of the surface engagedby it. the present instance, the arms 111 are loosely mounted on a shaft112, each'end of which may be fixed to a bracket 118 which is bolted orotherwise secured to a side of the frame 30, the arms 111 being capableof independent rotation on the shaft, and a spring 114 is provided foreach of these arms, one end of the spring engaging the respective arm,and the other end of the spring engaging a collar 115 which is fixed onthe shaft 112. The springs 11 1 act to yieldingly compress and hold theroller 108 against the surface of the folder roll 45 or a bag sectionthereon and as the outstanding edge a at the lead ing edge of the bagsection encounters the roller 108, it will be folded back and againstthe pasted portion of the bag section, thus effecting the pasting of thebottom fold of the bag. In order to prevent dropping of the roller 108into the longitudinal recess which is formed in the periphery of thefolder roll adjacent to the nipper blade 66 and thus avoid damage to theroll 108 or interference with the proper performance of the folding andpasting operation by this roller, means is provided for limiting theextent of inward movement of the roller 108 without, however,interfering with its movements while operating upon the section. Forthis purpose, the roller 108 is made of such length that its ends willride on the circular end plates 15 of the upper folder roll which have adiameter equal to that of the latter roll. A stop arm 116 may beprovided for each of the roller-carrying arms 111, these stop arms beingclamped or otherwise adjustably fixed on the shaft 112 alongside of therespective roller carrying arm, and each stop arm has a pin 117 fixedtherein and arranged to operate in a segmental slot 118 in therespective roller-carrying arm 111, the slot 118 being concentric withthe shaft 112. The stop arms 116 are so set on the shaft 112 that whenthe idler 118 on the'arms 111 against the stop pins 117. These seats 118and pins 117 however will not interfere with the yielding movements ofthe roller 108 in a direction away from the upper folder roll and theywill permit the arms 111 to be drawn back from the As shown in upperfolder roll to a sufficient extent to facilitate removal or replacementof the roller 108.

The impression roll 107, which is mounted on a shaft 119, the ends ofwhich are journaled in bearings in the sides of the supplemental frame30, is preferably of the same diameter as the upper folder roll #15 andit is driven at the same peripheral speed therewith and in a directionto advance the bag sections between it and the upper folder roll. In thepresent instance,the shafts 4E? and 119 of the upper folder roll and theimpression roll are connected by gears 120 and 121 which are of equalsize and form a direct connection between them. The impression rollwhich is shown particularly in Figures 7 and 2023, inclusive, is facedwith suitable packings or make ready 122 which insure effectiveimpressions upon the bag sections roll, a pair of these packings areprovided at diametrically opposite sides of the impression roller. Eachpacking, which may be composed of a strip or sheet of flexible yieldingmaterial, such as that commonly used in the'printing art, is secured atone end to the impression roll by doubling such end about an edge 125formed in the circumference of the impression roll and arranging itsterminal edge to be engaged by impaling pins 126 which are fixed in theperiphery of the impression roll and have pointed ends projectinginwardly therefrom. This end of the packing is retained in engagementwith the impaling pins by a clampingplate 127 which is fixed to andextends longitudinally of a shaft 128, the latter being mountedrotatably in heads 129 forming the ends of the impression roll, and thisshaft is provided with means for rotating it whereby the clamping plate127 may be brought into ;ripping relation with the impaled'ed' 'e of thepacking or it may be swung clear of such ed of the packing to permitinsertion or removal thereof incident to renewal. As shown, an end ofeach shaft 128 is provided with a crank 129 which is fixed thereto andcarries a nut' 130 and a screw 181 is engaged inthe nut and extendsthrough a lug 132 secured to the adjacent head of the roll, the screwhaving thrust collars 133 which prevent axial movement of the screwalthough permitting rotation In the present instance,

thereof in the lug. An angular end 13 1 is formed on the screw toreceive a wrench whereby the screw may be rotated. Rota-

